2025/01/04 by S. Vítek, Vítek, Stanislav, Tomáš Zbíral +3
Decision Sciences · Engineering · #FOS: Physical sciences #Knowledge Management and Technology #Optics (physics.optics) #Remote-Sensing Image Classification
paper · pdf · doi:10.48550/arxiv.2501.02239
openalex publication_date 2025/01/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Hyperspectral imaging (HSI) is widely applied in various industries, enabling detailed analysis of material properties or composition through their spectral signatures. However, for classification of construction and demolition waste (CDW) materials, HSI is impractical since real-time sorting requires rapid data acquisition and lightweight classification. Instead, fitting selected narrowband filters onto standard cameras can achieve comparable results with substantially reduced computational overhead. In this study, reflectance data of common CDW materials were recorded using a hyperspectral camera, and a multilayer perceptron classifier was employed to evaluate different feature sets. The findings indicate that adding only two wavelengths beyond the RGB channels is sufficient for high-accuracy classification, with optimal filter central wavelengths identified at approximately 650-750 nm and 850-1000 nm across the tested bandwidths (5-50 nm) highlighting the importance of near-infrared regions for material discrimination.